请在表格底部签名以确认你的信息。

Please ___sign at the bottom of the form to confirm your information.

老师用手势向我们解释了这个概念。

The teacher ___explained the concept to us using hand gestures.

他点头示意同意这个提议。

He ___signed his agreement to the proposal by nodding.

我们公司刚签了一位很有才华的设计师。

Our company just ___signed a very talented designer.